48. Joan Crawford
Crawford was one of Hollywood's biggest stars, but her personal life, as described by her adopted daughter, showed her as an abusive alcoholic mother. Crawford even has a whole movie, Mommie Dearest, dedicated to how batshit crazy she was. She was also involved with one of the worst Hollywood feuds in history with Bette Davis, who said, among other things, "Vodka was Joan Crawford's life support system."